Hi Chris,

Yes, Sonos Connect works very well with Beolab speakers, this is probably the most popular choice at the moment.  Quality is good and there aren't any issues with volume control that I'm aware of.  You can connect a pair of Beolab 3 speakers to a Sonos Connect with this cable:-

Thanks everyone, lots to take on here.

However there is the issue of adding a Sub (in my case it will be B&W PV1D) to the Beolab 3's

Clearly will need something to send the line signal to both speakers and sub together - is this where Playmaker is needed...or other?

Finally - if I want to add my turntable (having gone through a phono stage) that means having something where I can switch between two inputs. Can this also be accommodated?

Hi,

Please forget about Chromecast Audio if you want to add a turntable, as this streamer doesn't have a line input - switchers should not be used directly on the input to Beolab speakers or you will have major noise issues when you flick the switch from one input to another.

Instead, you need to look at a streamer like Sonos Port or B&O Playmaker that has a line input for the turntable.  Please let me know which one you choose and I can help with cables.

Either way, you can add the subwoofer, but the connections will vary depending on which streamer you choose.

Kind regards, Steve.

Regarding sound quality of Chromecast audio: You'll need to enable "Full dynamic range" to get acceptable audio quality out of that little UFOs.

See here:
https://support.google.com/chromecast/answer/6290498?hl=en&co=GENIE.Platform%3DAndroid

Of course a B&O sound system is the more comfortable way :-)